Worm gear drive aiming and locking mechanism

F - Mech Eng,Light,Heat,Weapons – 21 – S

Patent

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Details

F21S 8/02 (2006.01) F21V 14/00 (2006.01) F21V 21/04 (2006.01)

Patent

CA 2537606

According to a one embodiment of the instant invention an adjustable downlight assembly comprises a collar, a yoke adjustable through an arcuate distance, the yoke pivotally connected to the collar, and a worm gear drive assembly operably engaging the yoke and the collar for pivoting the yolk about a horizontal axis. The worm gear drive assembly, comprises a worm and a gear. The worm gear drive assembly is adjustable by rotation of the worm. The adjustable downlight assembly further comprises a biasing member fastened to a casting, the casting extending from an inner surface of the collar. The worm gear drive assembly inhibits unintentional movement of the yoke after adjustment is completed.

Selon un mode de réalisation de la présente invention, il s'agit d'un plafonnier intensif réglable comprenant un collet, un étrier réglable sur une distance arquée, ledit étrier étant relié au collet de manière à pivoter, et un entraînement à vis sans fin engageant activement l'étrier et le collet pour faire pivoter l'étrier autour d'un axe horizontal. L'entraînement à vis sans fin comprend une vis sans fin et un engrenage. L'entraînement à vis sans fin est réglable par rotation de ladite vis sans fin. Le plafonnier intensif réglable comprend en outre un élément de polarisation fixé à une pièce moulée, celle-ci s'étendant depuis la surface intérieure du collet. L'entraînement à vis sans fin empêche le mouvement involontaire de l'étrier une fois le réglage effectué.

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